Magnetically tunable silicon-ferrite photonic crystals for terahertz circulator |
| |
| Authors: | Fei Fan Sheng-Jiang Chang Chao Niu Yu Hou Xiang-Hui Wang |
| |
| Institution: | 1. Department of Electrical Engineering, Advanced Diagnostics and Therapeutics, University of Notre Dame, Notre Dame, IN 46556, USA;2. Department of Electrical Engineering, Center for Nano Science and Technology, University of Notre Dame, Notre Dame, IN 46556, USA;3. Department of Chemical and Biomolecular Engineering, Advanced Diagnostics and Therapeutics, University of Notre Dame, Notre Dame, IN 46556, USA;1. State Key Lab. of Transducer technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;2. Graduate University of Chinese Academy of Sciences, Beijing 100039, China;3. Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100029, China;1. Computational Physics Key Laboratory of Sichuan Province, School of Physics and Electronic Engineering, Yibin University, Yibin 644007, PR China;2. Engineering Technology Research Center of Magnetic Materials, Anhui Province, School of Physics & Materials Science, Anhui University, Hefei 230601, PR China;1. Laboratory of Terahertz Spectroscopy, Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology (State University), 9 Institutskiy per., Dolgoprudny, Russia;2. Department of Physics, Faculty of Science, Sohag University, Sohag University St, Sohag, Egypt;3. Prokhorov General Physics Institute of the Russian Academy of Sciences, 38 Vavilov St, Moscow, Russia;4. South Ural State University, 76 Lenin prospect, Chelyabinsk, Russia;5. Research Institute of Solid State Electronics Materials, MIREA ? Russian Technological University (RTU MIREA), 78 Vernadsky prospect, Moscow, Russia;1. Department of Physics, Nanchang University, Nanchang 330031, China;2. Institute of Space Science and Technology, Nanchang University, Nanchang 330031, China;3. Key Laboratory of Artificial Micro- and Nano- Structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, China |
| |
| Abstract: | The gyromagnetic properties of ferrite materials and the nonreciprocal property of a silicon-ferrite photonic crystal cavity are investigated in the terahertz region. Through the structure optimization and analysis of defect mode coupling, we design a magnetically tunable circulator, of which central operating frequency can be tuned from 180 to 205 GHz and the maximum isolation is 65.2 dB. Moreover, the further study shows that the gyrotropy, dispersion, and ferromagnetic loss of ferrite materials under the different external magnetic fields greatly affect the transmission and isolation property of this device. This circulator is flexible to realize functions of controllable splitting, routing, filtering and isolation by changing the external magnetic field for the THz applications. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
